All my images are without restrictions. Use them freely, you don't need to ask permision. On my own experience, you usually need to use the photo as soon as you find it. You can include them in your personal or commercial works. The sale or redistribution of the images (for example: the inclusion in a stock photos collection) is prohibited. It is prohibited the use of the images in works promoting intolerance, homophobia, hate, racism, etc... Hope my work be useful for you. I use a lot the material of this site, so I'm willing to contribute. Comments, credit and votes are highly appreciated.